Calipbks



as for the born 14 of the said arm.

' LADISLAV 'KAILAN, F CLINTON, CONNECTICUT.

' CALIPERS.

Specification of Letters Patent. Paterited Aug. 8,1918.

Application filed January 4, 1916. Serial No; 70,146.

To all whom it may concern:

Be it known that I, LADISLAV KAPLAN, a citizen of the United States, anda resident of Clinton, in the county of Middlesex and State ofConnecticut, have invented a new and Improved Calipers, of which thefollowing is a full, clear, and exact description Among'the principalobjects which the 30 present invention hasin View are: to provide ascale for recording the space separating the ends of the caliper arms;to provide simple and eiiicient means for magnifying the reading of thescale; to provide means for facilitating the operation of the calipers;and to provide means for setting the calipers for an establishedmeasurement. Drawings-Figure 1 is a side view of a calipers constructedand arranged in ac-- 2o cordance with the present lnvention; Fig; 2

is a section on an enlarged scale, the section being taken as on theline 22 in Fig! 1; Fig. 3 is a detail view partly in section, the

' section being taken as on the line 33 in Fig. 2; and Flg. 4 1s asection on an en- ,scale taken as on the line H 1n larged Fig. ,1.

Descflptz'0n.The calipers shown in the drawings is specially adapted foremployan ment in the manufacture of Violins and is provided with ahandle9. The handle 9 may be formed of metal or wood as desired and is rigidlyconnected witha haft 10 of the arm 11. The arm 11 is curved at the Iouter end to form the horn 12. The arm 11 and born 12 may or may notcorrespond in shape to the arm 13. In instances where the use suggeststhe change, the arm 13 is shaped to a greater or lesser curve than isshown instances the horn 1 1 is joined to the body of the arm 13 by alarge bellied section, the purpose being to reach over and encompass thematerial being handled without interference therewith.

The arm 13 is removably-mounted on a U- shaped section-15, one arm ofwhich has a hole to receive a, locating pin 16 and an elongated slot 17,through which a stud- 5 screw 18 may be extended. The arm 13 and varioussubstitutes therefor used in con-.

nection with the calipers are each provided with a pm 16 and screw 18.The various screws are engaged in service by a milled or other form ofscrew'nut 19, which when I 29 with the wheel 26,

In many tightened operates to clamp rigidly inservice position the arm13. I i

p The function of the slot 17 is to'permit' the slight adjustment of thearm 13 and I substitutes therefor at times found neces-,

sary. At all times, this adjustment is made so that the ends of thehorns l2 and ll of the two arms 11 and 13 or the substitutes thereforare in contact and the pointer; 20' is registered with the zero mark onthe-feeli-- brated scale blade 21.

The section 15 ispivotally mounted-by means of the screw 22 onthe arm11. The

section 15 is normallyrotated on the screw' 22 to hold the-ends'of thehorns l2 and 14 This office is performed by a in contact. coil spring23, which is housed in a recess formed in a bracket2 l rigidlyinountedon the arm 11. The free end of the spring 23 is fixedly attached to apivot pin25. The

pin 25is rigidly connectedwithagear wheel 26. The teeth, of the wheel26' mesh with the teeth of a gearsegment 27 at one end of the section15. -yt

The section 15, as stated, is rocked on the screw 22 and for thispurpose the said section is provided with a trigger 28convenientlylocated with reference to the handle 9.

When the said trigger is drawnupon, the section '15 is rocked so thatthe arm 13 is moved from the a'rmll and the segment 27 moves'to rotatethe wheel 26, so that the end of the pointer 20 moves over thecalibrations'on the blade 21. To this end and as best shown in Fig. 2 ofthe drawings, the pointer 20 is fixedly connected by the arm Thedifference in the length of the charm eter of the wheel 2-6 and thedistance from.

lot

30 extends into the path of a small cam 31. The cam 31 is fixedlyattached to a milled wheel 32. v The wheel 32, as is best seen in Fig. 2of the drawings, is normally held by Screw 22 The two a spring drag 33disposed between the said wheel and the face of the arm-11.--Preferwatching the movement of the pointer on the blade 21 may the horns12 and will always return to the position set and held by the cam 81 byreason of the fact that the pin swings back to and engages the surfaceof the said cam.

To ease the operation of the calipers, the screw 22 has a cap 34,wherein a circular ascertainthe space between groove is formed as a racefor balls 35. A

similar set of balls is disposed in; a groove formed in the section 15concentric to the sets of balls form a suitable ball hearing, whichprovides" a smooth operating joint for the said section 15 and the arm11.

Claims:

1. Calipers comprising a stationary arm; a movable arm; means pivotallyconnecting said arms intermediate the ends of said movable arm; acalibrated blade fixedly mounted on said stationary arm and extendingoutwardly therefrom; a pointer pivotally mounted on Said stationary armwith the free end of said pointer moving in juxtaposed relation withsaid blade; means for rotating said. pointer incorrespondence with themovement of said movable arm, said means embodying a wheel supportingsaid pointer; means on the adjacent end of said movable arm rotativelyengaging said wheel; a handle fixedly mounted on said stationary arm;and a trigger mounted on said movable arm in juxtaposed relation to saidhandle for rotating said movable arm on its pivotal mounting.

Calipers comprising a stationary arm; a movable arm; means pivotallyconnecting said arms intermediate the ends of said movable arm; acalibrated blade fixedly mounted on said stationary arm and extendingoutwardly therefron'i; a pointer pivotally mounted on'said stationaryarm with the free end of said pointer moving in juxtaposed relation withsaid blade; means for rotating said pointer in correspondence with themovement of said movable arm, said means embodying a wheel supportingsaid pointer; means on the adjacent end of said movable arm rotativelyengaging said wheel; a handle fixedly mountedon said stationary arm; atrigger mounted on said movable arm in juxtaposed relation to saidhandle for rotating said movable arm on its pivotal mounting; and meansmounted on one of said arms for engaging the other Copies of this patentmay be 14. Thereafter the pointer the the movement of said movable. arm,

obtained for five cents each, by addressingthe of said arms to regulatethe spacing of the free ends thereof.

Calipers comprising a stationary arm; a movable arm; means pivotallyconnecting said arms intermediate the ends of said mov-- able arm; acalibrated blade fixedly mounted on said stationary arm and extendingoutwardly therefrom; a pointer pivotally mounted on said stationary armwith the free end of said pointer moving in juxtaposed relation withsaid blade; means for rotating said pointer in correspondence withmovement of said movable arm, said means embodying a wheel supportingsaid pointer; means on the adjacent end of said movable arm rotativelyengaging said wheel; a handle fixedly mounted on said stationary arm; atrigger mounted on said movable arm in juxtaposed relation to saidhandle for rotating said movable arm on its pivotal mounting; and meansfor engaging said arms to regulate the spacing of the free ends thereof,said means embodying a cam rotatively mounted on said stationary arm,and a pin. on said'movable arm, said pin extending into the path of saidcam for engagement therewith.

, 4:. Calipers comprising a stationary arm; 'a movable arm;

on said stationary arm and-extending outwardly therefrom; -a--- pointerpivotally mounted on said stationary arm with the free end of saidpointer mox'ing in juxtaposed relation with said blade; means forrotating said pointer in correspondence with said means embodying awheel supporting said pointer; means on the adjacent end of said movablearm rotatively engaging said wheel; a handle fixedly mounted on saidstationary arm; a trigger mounted on said movable arm in juxtaposedrelation to said handle for rotating said movable arm on its pivotalmounting; means for engaging said means pivotally connecting said armsintermediate the ends of said movable arm; a calibrated blade fixedlymounted arms to regulate the spacing of the free ends thereof, saidmeans embodying a cam rotatively mounted on said stationary arm, and apin on said movable arm, said pin extending into the path of said camfor. engagement therewith; connected with said cam in juxtaposed relation to the handle of said calipers for moving said cam.

In testimony whereof I have name to this specification in the twosubscribing witnesses.

- LADISLAV KAPLAN.

signed my presence of 'Witnesses E. F. Munnoon, G. H. Eiusmn.

Washington, D. S.

lie

and a wheel 'rigidly "fiommissloner at Patentai

